Machine



(No Model.) 1

' W. H. & G. W. LEIMAN.

BUTTON BORING MACHINE.

No. 603,854. Patented May 1'0, l898.

UNlTED WILLIAM H. LEIMAN AND GEORGE W. LEIMAN, OF NEW YORK, N. Y.

BUTTON-BORING MACHINE.

SPECIFICATION forming part of Letters Patent No. 603,854, dated May 10, 1898.

Application filed January 13, 1898. Serial No. 666,5Z9. (No model.)

To all whom it may concern.-

Be it known that we, WILLIAM H. LEIMAN and GEORGE W. LEIMAN, citizens of the United States, and residents of New York, in the county and State of New York, have invented anew and useful Improvement in Button-Boring Machines, of which the following is a specification.

Our invention relates to an improvement in button-boring machines,with the object in View of providing simple and effective means for changing the position of the button with respect to the boring-tool and for ejecting and supporting the button.

A practical embodiment of our invention is represented in the accompanying drawings,

in which Figure 1 is a view of the machine, partly in side elevation and partly in longitudinal ver-- tical section. Fig. 2 is a top plan View. Fig. 3 is a View in detail of the button holding and ejecting mechanism, showing the two parts in the position which they assume when a bored button has been ejected and when a button to be bored is to be placed in position. Fig. 4 is an end view of the button holding and ejecting mechanism,and Fig. 5 is a transverse section through the line 5 5 of Fig. 2.

The base of the machine is denoted by A. At one end of the base standards 13 B are fixed, carrying in their upper ends the spindle b, to which the chuck b is secured for holding the boring-tool 19 The spindle b is rotated by means of a belt-pulley (i driven from a suitable source of power. (Notshown) At the opposite end of the base A there is fixed a plate C, providedwith, a bifurcated standard 0, in the branches of which a hollow shaft D is mounted; and arranged to be continuously driven by a. pulley E thereon.

The hollow shaft D carries on its end toward the boring-tool an annular clutch member F, so connected with the hollow shaft as to rotate therewith.as, for example, by an ordinary feather and groovewhile permitted to slide on the shaft, against the tension of a spring G, interposed between the clutch member F and the standard O.

WVithin the hollow shaft D there is a stoprod (1, which has a screw -threaded engagement with the interior of the shaft D throughout a portion of its length, as at d, and extends through to the end of the shaft which carries the clutch member for the purpose of forming a stop to the movement of the button-holder, as will hereinafter more particularly appear. The rod (1 is provided with a jam-nut d for holding it in the desired adjustment.

A second bifurcated standard (3 is fixed to the plate 0 intermediate of the boring-tool and the drive-shaft D and has mounted in its branches the longitudinally reciprocating and rotary hollow shaftH, carrying on'its end toward the shaft D the clutch member F, adapted to coact with the clutch member F to impart a rotary movement to the shaft II when such movement is desired. The shaft H has a grooved collar h fixed thereon,which receives studs 2' on the opposite branches of an operating-lever I, pivoted to the standard 0 at t". The operating-lever I serves to force the shaft H bodily back and forth in a longitudinal direction toward and away from the boring-tool and toward and away from the clutch member F. A

Within the hollow shaft H there is located a rod or'bar K, having its end toward the boring-tool split, in the present instance divided into quadrants by slits 70, extending a considerable distance back from its head. Its head Z0 in which the button to be bored is received and held, is enlarged,- the exterior being of tapered form, as shown at lo so that as the rod is moved toward the left as the drawing is held the tapered portion will engage the inner surface of the hollowshaft H and close the sections of the split end of the tool, so as to grip the button tightly in the end. The bar K is further provided with an interior bore 16 (see Fig. 3,) extending a considerable distance from its receiving end, and in the said bore k there is located a spring k having at its outer end a disk M, which under the tension of the spring normally extends outwardly partially across the space which the button to be bored occupies when held in the receiver. When the button isput in position, the disk 70 is forced back against the tension of the spring in? but when the holder is slid to the right to release its grip upon the button the disk k is pushed outwardly and serves to promptly free the button from the holder and cause it to drop out of the way. i The disk k also serves as a support for the button to prevent its chipping on its back as the holes are being bored.

A spring L is interposed between an abutment h on'the interior of the shaft H and an abutment k on the rod or bar K, tending to hold the rod or bar K at the limit of its movement withdrawn toward the left within the shaft H. V

For the purpose of arresting the rotary movement of the shaft H, carrying the button to be bored, in the proper positions to receive the action of the boring-tool we provide the shaft H with a pin or abutment b and to the supporting-standard C we pivot stopdogs h -in the present instance four-arranged at a quadrants distance apart and capable of being swung back out of position to engage the pin b when for any reason the number of holes to be bored is less than four.

To hold the stop-dogs it down in position or up out of, as the case may be, we provide a spring-band h having one of its ends turned upwardly to form a handle 71 for operating it. A little space is left between the adjacent ends of the spring-band If, as clearly indicated in Fig. 5, so that when this space is brought into position to register with one of the stop-dogs h the latter may be swung up away from the shaft H, and the split band h may then be slid around into position to hold it out of engagement with the shaft.

The free ends of the dogs h are beveled, as shown at h", causing the pin 72 to free itself from the dog when the shaft H is reciprocated for the purpose of rotating it into a position to receive the boring-tool for the successive perforations.

The shaft H is also provided with a pin or stud h which coacts with the bevel-faced teeth 0 on a sleeve 0, which projects from the supporting-standard 0 toward the clutch member F. The sleeve 0 is provided with slots 0 at intervals corresponding to the holding-dogs h which slots 0 are adapted to receive the pin or stud it while the tool is operating upon the button to hold the button against rotary displacement. The bevelfaced teeth 0 serve to direct the pin k to the slot 0 and serve to adjust the shaft H, and hence the button, exactly in the desired position after the shaft has been rotated from one position to another.

In operation the operating-lever I is swung by its handle to the left as the drawing is held, forcing the end of the bar K into contact with the end of the adjustable stop 01, thereby pushing the bar K to the right and leaving its split holding end free to expand for the reception of a button.

By bringing the clutch member F into engagem'ent with the clutch member F the shaft H is rotated until the pin k engages one of the stop-dogs it A button to be bored is then placed in the .receiving end of the bar K, and the handle of the lever I is swung to the right, permitting the spring L to withdraw gagement with the clutch member F to rotate the shaft H into position to receive again the action of the boring-tool, but not sufficiently far to cause the stop (1 to push the bar K and release the button, when the handle of the lever is again swung to the right and another hole bored, and this is repeated until the button has been bored and is ready to be ejected, when the handle I is swung to the limit of its movement to the left, forcing the bar K out of its position within the shaft H sufficiently to permit its head to expand and the ejectingspring k to give the bored button a push. During this operation it is important to observe that when the shaft H is being slid to the right to bring the button into engagement with the boring-tool the beveled face of the tooth 0 served to rock the shaft just enough to bring the stop k into alinement with the dog h so that when the return movement of the shaft took place the beveled end of the dog operated upon the stop h to cause it to return on the opposite side of the dog b from that in which it advanced toward the boring-tool, and hence leaving the shaft H free to rotate until interrupted by the succeeding dog.

It is obvious that changes might be resorted to in the form and arrangement of the several parts without departing from the spirit and scope of our invention. Hence we do not wish to limit ourselves strictly to the structure herein set forth; but

What we claim is- 1. The combination with the holder and means for reciprocating it in a longitudinal direction, of a continuously-rotating shaft and means for temporarily clutching the holder to and releasing it from the shaft to change the position of the button, substantially as set forth.

2. The combination with the button-holder and means for rotating it, of stop-dogs for arresting the rotary movement of the holder and means for bringing difierent numbers of the dogs into operative position relative to the holder, substantially as set forth.

3. The combination with the holder and means for rotating it, of stop-dogs pivoted in position to swing into and out of. operative position and a spring-band for holding them in and out of operative position, at pleasure, substantially as set forth.

4. The combination with the holder and means for rotating it, of a stop-dog having a beveled end, a cam, stops on the shaft in position to coact with the beveled end of the dog and with the cam to free the shaft from the dog and means for reciprocating the receiv- IIO ing-holder to bring the stops into engagement with the dog and cam to free the shaft from the dog and permit it to rotate, substantially as set forth.

5. The combination with the holder and means for reciprocating it in a longitudinal direction, of a stop on the shaft, a cam with which the stop engages and a slot for receiving the stop as it leaves the cam to lock the holder against a rotary movement during the boring operation, substantially as set forth.

6. The combination with the longitudinallyreciprocating and rotary holder, a rotary shaft and means for clutching the holder to and releasing it from the rotary shaft, of an adjustable stop seated in the rotary shaft for moving the holder relative to its support to release the button, substantially as set forth.

WILLIAM H. LEIMAN. GEORGE W. LEIMAN.

Witnesses:

FREDK. HAYNES, EDWARD VIEsER. 

